Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 6, No. 27, Ed. 1 Saturday, December 20, 1913, newspaper, December 20, 1913; (https://gateway.okhistory.org/ark:/67531/metadc157179/m1/2/: accessed April 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .